Automatic stop mechanism for talking-machines



E I. CONDO-N, In. AUTOMATIC STOP MECHANISM FOR TALKING MACHINES.

APPLICATION FILED OCT- I7, I9I6. 1,351,839.

Patented Sept. 7 1920.

2 SHEEISSHEET I.

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gvwewfoz EQT. CONDON, JR. AUTOMATIC STOP MECHANISM FIJR TALKING MACHINES.

APPLICATION FILED OCT. I7, I916. 1,351,839.

Patented Sept. 7, 1920.

2 SHEET SSHET 2.

UNl'lED STATES rarest rrlc EDWARD T. CONDON, JR., OF NEW YGRK, Y.

AUTOMATIC sror mnci-rsmsirror. TALKiNG-MACI-IINES.

Specification of Letters Patent.

Patented-Sept. 7, 1920.

Application filed October 17, 1916. Serial No. 126,070.

of a selection; It has for its object to provide a device of thls character which shall be simple in construction, self-contained,

. and eflicient in its actionr A further object of the invention is to afford a brake mechanism which shall be operative, simultaneously with its setting for a particular record, to free its turn-table for therotation thereof. The mechanism, moreover, is adaptable to talking machines in which the stylus operates either from the outside of the record toward the center, as is the gen eral practice, or vice versa. I

The natureof the invention will be best understood when described in connection with the accompanying drawings, in which- Figure l is a front elevation, partly in section, of the upperportion of a talking machine equipped with the improved stop mechanism.

Fig. 2 is a plan thereof with portions broken away.

Figs. 3 and i are detail views, partly in 7 section, illustrating the operation of the stop mechanism.

Figs. 5 and 6 are detail perspective views of parts ofthe automatic stop mechanism.

' Similar characters of reference designate corresponding parts throughout the several views.

Referring to the drawings, 10 designates the top or motor board of a talking machine, comprising the usual turn-table 11 adapted to be suitably rotated, by suitable mechanism (notshown) through shaft 12, and to support the record 13. The latter is'adaptec to be engaged by a stylus 14c of sound box 15 carried by tone arm 16, the horn 17 of the talking machine being herein described and shown, by way of example, as of the con eealed type. A tone arm-base 18 is mounted, in this embodiment, over the inner end of said ho n 1? and receives the inner end of the tone arm'lG, supporting same so as to be rotatable about the vertical axis of the base 18 as well as about a horizontal axis at right angles thereto. For this purpose, the inner end of tone arm 16 carries a rod 19 extending diametrically therethrough, its protruding ends forming trunnions adapted to engage 1n circular groove 20 of a cap or base 21 set in the upper end of the tone armbase. The lower end of cap'2l forms one face a raceway in the wall of tone arm base 18, and in which raceway is mounted a set of balls-23 to provide a free bearing for a collar 2-l retained thereby within said tone arm base. Said collar is provided with a peripheral groove 2+! for said balls and retains internally a frictionally mounted spring ring or open annular member 25 fitting the same snugly and movable normally therewith. Said ring is provided with a fork 26 extending radially inward and on gaged by a rod 27 extending downwardlv from the inner end of the tone arm 1'6 intb the tone arm base and through said fork,

whereby the ring 25 and collar 24 are caused to more as a unit with said tone arm 16. Collar 24-, moreover, is provided with an opening 28 through its wall and is adapted to register with a similar opening 29 through the wall of the tone arm base 18 and to receive the inner end of a rod 30 passing through the opening 29. Under these conditions, collar 2% may be locked with respect to the tone n base and ring 25 moved relatively thereto with the tone arm 16, the movement of both ring and tone arm being limited by contact between the projecting end of rod 30 with the ends of the said ring.

Rod is springurged toward the opening 28 by means of a spring 31 coiled about its outer end and acting against a shoulder 32 thereon and a lug 33 extending from the motor board it). l 'Jhen locked in the opening 28, the spring 31 is so adj sted that a brake member 3i mounted on the rod will engage the inner wall of rim or down-turned flange portion of the turn-table to stop its rotation. 36 of said rod 30 is provided with a sleeve 3'? of insulating material which is adap ed to engage the two tongues 38 of switch member to open, as indicated in A at, or to close, indicated in Fig. 3, suitable con- .ii downwardly extending pin all) taets 39, the former condition existing when the brake member 34 operates to stop the rotation of table 11.

It will be understood that-the electrical portion of this mechanism will be required only where the turn-table is rotated by an electric .motor, the circuit to. which is controlled by said contacts 39 through conductors 40 leading therefrom, as is well understood. 5

In order to release the brake 34 and to close contacts 39, thereby starting the rotation, of table 11 and to set the mechanism for effecting the stopping of the record at the completion of the selection, the tone arm 16 brought in position such that its stylus will engage the last (inner or outer as the case maybe) groove of the -record for example, tone arm axis in position Z)Z), Fig.4, The rod is then manually withdrawn from thecollar 2 and held in opposition to the spring 31 until the openings no longer register, the tone armbeing returned to thedesired starting position with axis in position a-a, Fig. 3and the stylus 14: caused to engage the record 13.

The. collar 2a with ring 25 is thereby rotated withthe tone arm and is in such position that the inner end of rod 30 presses against the outer surface of collar 2%, and

the said rod,,therefore, is maintained in its retracted position, permitting free rotation of the'turn-table 11. At the completion of the selection, collar 2d will have returned is at rest, the collar 24: being locked against rotation by the inner end of said rod 30.

I claim: 7 V V 1. Automatic stop mechanism for talking machines, comprising: the tone arm of the machine, and a base in which the same is mounted; a collar within said base, rotatable with the tone arm and provided with an opening; and brake actuating mechanism including means adapted to engage said opening of the collar 2. Automatic stop mechanism for talking I machines, compr1s1ng:.the tone arm of the 'machine, and a base in which the same is mounted, said base being provided with an opening; a member within said base, movable with said tone arm and having an opening adapted to register with said opening of the base; and brake actuating mechanism' including means adapted to engage both of said openings to effect the stopping of the rotation of the talking machine turn-table.

3. Automatic stop'mechanism for talking machines, comprising: the tone arm of the machine, and a base in which the same is mounted, said base being provided with an opening; a member within said base, mov- .able with said tone arm and having an opening adapted to register with said opening of the base; and brake actuating mechanism including means adapted to engage both of said openings to effect the stopping of the rotation of the talking machine turn-table and to be retracted from one of said openings. V s 1 l. Automatic stop mechanism for talking machine's, comprising: the tone arm of the machine, and a base in which the same is mounted means within said base, rotatable with said tone arm; a brake actuating memberadapted' to engage same to effect the stopping of the rotation of the talking machine turn-table; and a member movable with said tone arm relatively to said means rotated by the tone arm.

5. Automatic stop mechanism for talking machines, comprising: the tone arm of the machine, and a base in which the same is mounted; a collar within saidbase, rotatable with said tone arm and provided with an opening; brake actuating mechanism including a rod adapted to engage said opening of the collar; and a ring frictionally retained in said collar and movable by said tone arm.

6. Automatic stop mechanism for talking machines, comprising: the tone arm of the machine, and a base in which the same is mounted;a collar within said base, rotatable with said tone arm and provided with an opening; brake actuating mechanism including a rod adapted to engage said opening of the collar; a ring frictionally retained in said collar andmovable by said tone arm; and a member extending from said tone arm adapted to engage said ring.

7. Automatic stop mechanism' for talking machines, comprising: the tone arm of the machine; a collar rotatable therewith and provided with an opening; brake-actuating'mechanism including a rod adapted to engage saidopening of the collar; a ring frictionally retained in said collar having a fork extending radially therefrom; and a rod extending downwardly from said tone arm through said collar and the fork of its said ring.

8. Automatic stop mechanism for talking machines, comprising: the tone arm of the machine, and a base in which the same is mounted, said base being provided with an opening; a collar provided with an open'in adapted to register with the said opening or the base; a ball bearing for mounting the collar in the said base; brake actuating mechanism including a rod adapted to engage said openings; a ring frictionally retained in said collar having a fork eXtending radially therefrom; and a rod extending downwardly from said tone arm through said collar and the fork of its said ring.

9. Automatic stop mechanism for talking machines, comprising: the tone arm of the machine, and a base in which the same is 10 mounted; a collar Within said base, rotatable With said tone arm and provided with an opening; brake actuating mechanism including a rod spring-urged toward said opening of the collar to engage the same; and a ring frictionally retained in said collar and movable by said tone arm.

Signed at New York, in the county of New York and State of New York, this 13th day of October, A. D. 1916.

EDWARD T. CONDON, JR. 

